This paper is based on material collected by an oceanographic survey vessel during the CANCAP expeditions. In the years 1976-1978, 1980, and 1981 the CANCAP I-V expeditions have investigated the zoology, botany and paleontology of the areas surrounding the Canary Islands, Madeira, Porto Santo, the Selvagens Islands, the Azores, and the coasts of Morocco. Cuspidariid bivalves were obtained by taking grab samples, dredging and trawling. The new species here described have been compared to specimens in the following collections: Instituut voor Taxonomische Zoölogie (Zoölogisch Museum), Amsterdam; Koninklijk Belgisch Instituut voor Natuurwetenschappen, Brussels; Natur-Museum Senckenberg, Frankfurt am Main, West Germany; Rijksmuseum van Natuurlijke Historie, Leiden; British Museum (Natural History), London; Museum National d’Histoire Naturelle, Paris; National Museum of Natural History, Smithsonian Institution, Washington D.C., U.S.A. Acknowledgements are due to the curators in charge for kindly submitting their material for inspection.